Pipe-coupling device.



UNITED STATES PATENT OFFICE..

CHARLES LUKE, OF MILFORD, CONNECTICUT, ASSIGNOR, BY IIIESNE ASSIGN- MENTS, TO THE NE\V HAVEN NOVELTY MACHINE COMPANY, OF NEW' HAVEN, CONNECTICUT.

PIPE-coutume Device.

sPEcIFIcaTIoN forming, part of Letters Patent No. 633,325, dated september 19, 1899.

Application filed April 20, 1899. Serial No. 713,760. (No model.)

T 017/7/ HJW/07?@ 771i YWU/ OUYZCWW/f of the plug will act on the end of the pipe be- Be itknown that I, CHARLES LUKE, of Miling expanded by the plug and will turn said ford, county of New IIaven, State of'Connectiend over, causing the pipe to enter the annucut, have invented an Improvement in Pipelar groove of the collar and present there an Coupling Devices, of which the following deannular flange filling said groove. 55

scription, in connection with the accompany- Figurelshowstwopieces oflead pipeunited ing drawings, is a specification, like letters byone form of coupling embodying my invenon the drawings representinglike parts. tion. Fig. 2 is a longitudinal section of Fig.

This invention has for its object to provide l with the exception that the collar at the right xo a coupling device for use with lead and simioccupies a different position, the figure show- 6o lar ductile pipe which will readily adapt itself ing by dotted lines a collar occupying a posiunder compression into other shapes. tion on the pipe preparatory to its arrival in My novel coupling is adapted in one forln the position shown at the right of said figure in which l have chosen herein toillustrate it by full lines. Fig. 3 shows a collar with a to joining the ends of lead pipe without solpiece of pipe flanged in its annular groove. 6

der, and byits use agas-tightconnection may Fig. 4 shows the plug detached; and Fig. 5 be effected without making a solder or wiped shows a modification, to be described. joint, as now invariably done when uniting A and B represent two pieces of lead pipe lead pipe, and in another form it is adapted to be joined quickly withoutlhe use of solder. zo to join the end of alead p ipe with, say, a gas- To do this, I employa plug C, shown as hav- 7o inetei-,washbowh bath-tub, beer-fixtures, dac., `ing two cylindrical portions c c' threaded, the where lead pipe is used. end of each threaded portion being termi- My novel coupling presents a sleeve-like nated, respectively, byan annular shoulder c2 collar threaded internally at one end toward c3, and beyond said shoulders, which are cut the middle of its length, the collar at the end into the plug for a considerable distance in 75 of its thread being provided with an annular excess of the depth of said screw-threads, the groove, and from said groove to the opposite ends c4 c5 of the plug, Figs. l, 2, and el, being end of the collar its interior is tapered, so tapered and threaded to a substantially that that end of the collar presents a smaller thin edge. Cooperating with the cylindrical '3o diameter. This collar is entered bya hollow threaded portion c c/ ofy the plug are collars 8o plug having a threaded cylindrical portion D, provided each at one endwith interior adapted to engage the screw-threads of the screw-threads to engage the threaded part c collar, the threaded cylindrical part of the c of the plug, and at the inner end of the plug being terminated by an annular shoulthreaded part of each collar is an annular der, and from said shoulder the hub is tagroove d, and from said groove to its opposite 85 pered and threaded, and the degree or incliend said collar decreases in diameter and is nation of the taper is substantially the same made to present a tapered interior, the deas that at the interior of the collar. In the gree of taper of the collar being substantially use of the described coupling the collar may the same as that of the end of the plug. To 4o be slipped fully on the end of alead pipe, and unite the pipe and plug, I may slip a collar 9o the end of the tapered part of the plug may on the end of the pipe, as shown by dotted be just entered at the open end of the pipe, lines at the right in Fig. 2, and then put the and then the collar may be slid on the pipe end of the pipe in position against the end of until its threads meet the threads at the cythe plug, so that the tapered part of the plug lindrical part of the plug, when the plug will may enter the end of the pipe. I then slide 95 be turned to enter the collar, the tapered the collar on the pipe, causing it to pass over threaded end of the plug cutting its way into the tapered part of the plug, and the collar the pipe and acting, with the tapered surface arriving at the cylindrical threaded part of of the collar, to hold and clamp the pipe to the the plug the latter is turned so that it enters 5o collar, and during this operation the shoulder the threads of the collar, and as the plug so roo enters the collar the tapered threaded end of the plug started into the open end of the pipe cuts its way into the pipe and also quickly stretches or expands the same, causing it to it the tapered interior of the collar, and finally the shoulder of the plug contacts with the end of the pipe and forces it into the groove d of the collar, forming a iiange (Z3 on the pipe, which ills the groove of the collar, thus fixing the pipe in the collar. In making the joint white lead may be used, if desired; but the joint may be made gas-tight merely by pressure of the pipe between the tapered threaded end of the plug and the tapered interior of the collar.

Fig. 5 shows a modified form of iiiy invention, it being adapted to connect a lead pipe with a threaded part of a gas-meter or other device or article. In this modification instead Of employing a hollow plug threaded at each end of the wrench-receiving portion c6 I employ but one threaded and tapered end, and I provide one end of the plug with a plain part f, separated from the cylindrical threaded part c by a shoulder f2, and the extremity of the plug opposite its tapered threaded end is provided with a screw-thread f3, which is terminated at a shoulder f4. On this plain partf I apply a running nutf, and I then apply to the threaded part f3 a ringf6 to keep the running nut in working position. This running nut may be turned onto any usual threaded projection of a meter oi the fixture of a washbowl, bath-tub, sink, or beei' Outfit, and the ring]CG may support a washer fitted tightly On the threaded endf3 ofthe plug. The joint formed by the running nut)Fr with the under connection may be of usual kind.

In my invention the gasway in the pipe and the plug are of substantially the same diameter.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A pipe-coupling composed of a hollow plug presenting at each end a threaded cylindrical portion terminated by a tapered threaded portion, the threads of such portions being of the saine pitch and two collars threadedto engage the threaded cylindrical parts of the plug and tapered to correspond substantially with the taper of the plug.

2. A-pipe-coupling composed of ahollow plug presenting a threaded cylindrical portion and a threaded tapered end, the cylindrical portion and the tapered portion being separated by an annular shoulder, and a collar threaded internally at one end, the collar having within it at the end of the screwtliread an annular groove, the collar being tapered internally from said groove toward its end and contracted in diameter.

3. A pipe-coupling composed of a hollow plug presenting a threaded cylindrical poi'- tioii and a threaded tapered end, the cylindrical portion and the tapered portion being separated by an annular shoulder, and a collar threaded internally at one end, the collar having within it at the end of the screwthread an annular groove, said groove presenting a shoulder having a face parallel with the annular shoulder of the plug.

4. A pipe-coupling composed of a hollow plug presenting at each end a threaded cylindrical portion terminated by a tapered threaded portion the threads of the cylindrical portion and the tapered portion being of substantially the saine pitch, and two collars presenting threaded portions and tapered portions and also a shoulder and an annulaigroove between each threaded and tapered portion, the threaded portions engaging the threaded cylindrical portions of the plug, the tapered portions being substantially of the same length as the tapered threaded portions of the plug, whereby the pipe in which the threaded tapered portions are screwed are embraced by the collarsubstantially throughout the length of the threaded tapered portion.

In testimony whereof I have signed my naine to this specification in the presence of two subscribin g witnesses.

CHARLES LUKE. lVitnesses:

HENRY G. THOMPSON, GEORGE E. ITAIGHT. 

